Arc-positioning device.



J. SUCHY.

ARC POSITIONING DEVICE.

APPLICATION FILED JUNE 6,1913.

1,203,433. Pateflted Oct. 31,1916.

- byzMM His v ttorney m: mkms PETERS 0a.. PHOTU-LII'NO. WASNINHUN. 11c,

UNITED STATES. PATENT OFFICE,

JOHANN: SUCHY,. OF IERANIKFOR'I.-IBOC1KENI-IEIM GERMANY, ASSIGNOR' TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK;-

ARC-POSITIONING- DEVICE.

I Applieation filed-lune 6,

sitioningdevice, andhasforitsobject an: improvement in a devlce of thlscharacter.

In search lights or: projeot'ors, -;where reflectors are used and where the source-of light is' an arc, it is important to'keep the are focused with reference to thereflector.

=The electrodesare usually both fed togetheror apart instep, and the-feeding mechanismso arranged with reference tothe sizes of the two-electrodes as to maintain the arcing tips of the two electrodes at substantiallythe samev distance from the center of the re flecto-r. It is well known; however, that the are hasa tendency to wander about-the arcingfaces of theelectrodes, and-thusto shift the crater, which is the principal source oflight produced by the plainca rbon electrodes which areordinarily employed in searchlightsy laterally'from the axis of the lamp.

My invention provides means foradjusting the position of the arc-t comprising a magnet which, in the embodiment here shown, is :an elongated magnet partiallyisu'rrounding one of the electrodes and manually operated means for imparting to said magnet at will a partial rotation in either direction and thereby positioning the arc; The magnet is. at the same time. movable along the axis of the electrodes so that the strength of the magnetic field may be varied in accordance with the requirements of the arc. By this combination of movements it is possible to keep the arc in that position which produces the best results.

For a fuller understanding of my nvention, reference may be had to the accompanying drawings which show only so much of the lamp mechanism as is necessary to properly understand my invention.

Figure 1 is an end view, partially broken away, of a device embodying my invention and Fig. 2 is a plan view thereof.

In the drawings 1 and 2 are the electrodes between which the arc is formed which are ordinarily composed of plain carbon when used in search lights or projectors, and 3 is Specification of LettersPatent.

Patentetl Oot; 31,1916. 1913. I Serial at. 772,105.

the" casing fo-r housing the lamp mechanism. A- pair of bracketset are secured at the top of'thecasing and support at their lower ends a base plate This'plate'is provided with a rack 6 for a purpose that will be merc fully hereinafter explained. and it is also provided on its upper sidewith a dovetailed groove 7. A carriage- 8', mounted uponthe base plate 5, is provided=with a hug 9 which isshaped to conform to'the:

groove 7 so that the carriage is held to the baseand movable along the same and along th'e axis-of the Searchlight: The carriage is provided with an upwardly extending :frame or bracket 10 having a concave portion 11 at the upper side with a-- groove in which an elongated segmental magnet 12, which'I have here shown as a permanent magnet, is

seated. The outer face of this magnetis provided with'a toothed gear 13, which-is engaged 'bya worm-gear15 through an openingtld in the bottom'of the concave portion of the frame or' bracket l-Oa The worm gear 15 is carriediby a shaft 16 which is suitably journaled in the frame 10 and whiclrmay be given ,apartial rotation I either directiorf about the axis of the electrodes from a point a without: the casing by means ofanextensible shaft 17 which is connectedto the shaft 1-6 by a u-niversa-l joint -18. The shaft 17 is provided at its outer end. at a point without thescasing; withahandle-19 by which such rotation may be manually produced by the operator at will. It will be seen that a rotary movement of the shaft 17 produces a movement of the magnet 12 about its own axis and the axis of the electrodes, and by such movement the arc may be positioned by being repelled and driven to any point desirable on the arcing face of the electrodes. The carriage is also provided with a pinion 20 mounted in the frame of the carriage and in a special bracket 21. The shaft on which the pinion 20 is mount-, ed is rotatable by means of an extensible shaft 22 connected to the shaft of the pinion 20 by a universal joint 23. The outer end of the shaft 22 is provided with a handle 24. by which the shaft 22 and the pinion 20 may be rotated, and it is obvious that by rotating =the pinion 20 the carriage is moved along the base plate 5 and the magnet 12 moved longitudinally along the axis of the electrodes. I

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; out I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. In an arc lamp, a pair of electrodes, a blow magnet located to one side of the axis of the electrode, and manually operated means for imparting to said magnet at will a partial rotation in either direction and thereby positioning the are.

2. In an arc lamp, a pair of electrodes, a blow magnet located to one side of the axis of the electrodes, means for rotating said magnet about said axis, and means for moving said magnet longitudinally of said axis.

3. In an arc lamp, a pair of axially alined electrodes, a segmental magnet partiallysurrounding one of the electrodes, manually operated means for imparting to said magnet partially surrounding one of the electrodes, means for rotating said magnet about the axis of the electrodes, and means for moving said magnet longitudinally along the electrodes.

5. In an arc lamp, a pair of axially alined electrodes, a segmental blow magnet having its axis substantially concentric with the axis of the electrodes, means for rotating said magnet about its own axis, and means for moving the same longitudinally along the axis of the electrodes;

6. In an arc lamp, a pair of axially alined electrodes, a casing for housing the lamp mechanism, a segmental magnet substantially concentric with the axis of the electrodes, means operable, from without the casing for rotating said magnet about the axis of the electrodes, and other means operable t'rom without the casing for moving said magnet longitudinally along the axis of the electrodes.

7. In an arc lamp, a pair of axially alined electrodes, a segmental magnet provided with a toothed gear, a carriage for supporting said magnet, means comprising said toothed gear for rotating said magnet about the axis of the electrodes, and means for moving said carriage parallel to the axis of the electrodes.

8. In an arc lamp, a pair of axially alined electrodes, a segmental magnet substantially concentric with the electrodes, a carriage for supporting the same, means for rotating said magnet about the axis of the electrodes, and means for moving the carriage parallel to the axis of the electrodes.

9. In an arc lamp, a pair of electrodes, a carriage movable along the axis of said electrodes, a magnet supported on said carriage laterally of the electrodes, means for rotating the magnet about the axis of the electrodes, and means for moving the carriage along the axis of said-arc lamp.

In witness whereof, I have hereunto setmy hand this fifteenth day of May, 1913. JOHANN SUCHY. Witnesses:

JEAN GRUND, CARL GRUND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

